321967 has 4 divisors (see below), whose sum is σ = 323176. Its totient is φ = 320760.

The previous prime is 321961. The next prime is 321983. The reversal of 321967 is 769123.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 321967 - 2¹¹ = 319919 is a prime.

It is a Duffinian number.

321967 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9 + ... + 802.

It is an arithmetic number, because the mean of its divisors is an integer number (80794).

2³²¹⁹⁶⁷ is an apocalyptic number.

321967 is a deficient number, since it is larger than the sum of its proper divisors (1209).

321967 is an equidigital number, since it uses as much as digits as its factorization.

321967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

The product of its digits is 2268, while the sum is 28.

The square root of 321967 is about 567.4213601901. The cubic root of 321967 is about 68.5388984674.

The spelling of 321967 in words is "three hundred twenty-one thousand, nine hundred sixty-seven".